Assigxor to the



(No Model.)

G. P. HUTCHINS.

SHEDDING MECHANISM FOR LOOMS.

Patented Feb. 26, 1889 lkhc mphcr, Washinphm u UNTTED STATES PATENTOFFICE.

GEORGE l IIITCIIINS, OF \VORGESTER, )IASSAFH['SETTS, ASSIGX OR TO THEKNOIYLES LOOM \VORKS, OF SAME PLACE.

SHEDDlNG MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 398,618, dated.February 26, 1889.

Application filed November 10, 1888 Serial No, 290,420. (No model.)

To all whom it may concern:

Be it known that; I, GEORGE I 11 UTCHlNS, a citizen of the UnitedStates, residing at Torcester, in the county of \Vorcester and State ofMassachusetts, have invented certain new and useful Improvements inShedding Mechanism for Looms; and I do hereby declare that the followingis a full, clear, and 7 exact description of the invention, which, inconnection with the drawing making a part of this specification, willenable others skilled in the art to which my invent-ion belongs to makeand use the same.

My invention relates to the harness meehanism for looms; and the objectof my ini vention is to secure equal travel of each end i of theharness-frame when lifted by a compound strap or cord connected to thelifting jack or lever, and to provide means of adjustment by which theharness-frame may be set higher or lower after being once leveledwithout disturbing the individual straps 1 or cords at: the ends of theframe.

The drawing represents a detached portion of a loom with my improvementsapplied thereto.

In the drawing, 1 is the arch or elevated portion of a loonrframe 2 arethe harnessIrames.

23 are the individual straps or cords passing over the sheaves 4:,supported on the same 1 level by pins 5 in the frame and connected byhooks 6 to a single strap or cord, 7, which passes over a thirdsupplemental sheave, 8, supported in the adj ustin g-stand 9, and thenceto the usual connections with the jacks or harn evers 1 t I.

The supplemental sheave 8 is of such size that a horizontal line drawnfrom its top cuts the harness-levers 10 in about the center of thespaced notches, which are employed for obtaining an angular shed bygiving an increased travel to the harness-frames toward the back of theloom, while a horizontal line drawn from the bottom of sheave 8 passesjust above the tops of sheaves at. The pin which supports sheave S isfitted to slide freely in a slot, 11, in the stand 9, and is pro videdwith an car, 12, which projects outside I of the strap or cord.

' the stand and is tapped to receive the ad- ;iustingscrew 13, which isfitted to turn loosely in hub 1-4., cast to stand 9, and which isconfined longitudinally in said hub by the collar and hand-wheel 16,fast on the screw-shank.

By turning the screw 13 out of hub 12 the sheave-pin is forced away fromthe harnesslevers 10, thereby raising evenly both ends of theharness-frame.

I have shown by dotted lines '17 the old method of connecting theindividual straps or cords to a single harness-lever. It is obvious thatthe travel of the end of the harness-frame farthest from the lovers willbe greater than that of the other end, owing to the difference in theangles which the straps or cords make in passing over the sheaves.

Carried to an extreme case, the strap or cord passing to the farthersheave would be approximately tan gent to the sheave 011 top, and thehorizontal arc movement of the lever transmitted scarcely diminished tothe vertical part of the strap or cord, while the strap or cord passingto the nearer sheave would be tangent to the sheavenear the point 18,

' around which it would swing as a center, the

horizontal are movement of the lever impart ing scarcely any motion tothe vertical part By the old method, it it was desired to adjust thevertical position of the harness-frame, it was necessary to move eachend of the frame separately, necessitating a releveling of the frame;but by means of the adjustable supplemental sheave h, I can adjust theposition of the frames as desired.

I'Ia-vin th us descril'ied my invention, what I claim new, and desire tosecure by Letters Patent, is

1. In a loom, the (mmbination, with a harness-lever, harness-frame, andtwo sheaves, as 4, located in the loom-frame, of a third supplementalsheave, as 8, located in a plane above the sheaves l and at the oppositeend of the frame from the harnesslever, and straps or cords connecting"the harness-lever with the harness-f ram e, which passes over the sheave8 to the sheaves i, substantially as set forth.

2. In a loom, the combination, with a barness-lever, two sheaves locatedin the l00n1- individual harness-frame straps or cords with frame, aharness-frame, and individual straps the harness-lever, substantially asshown and or cords passing from said frame over said described.

v sheaves, of a third supplemental sheave sup- GEORGE F. HUTCHINS. 5ported above the loom-frame, means for ad- \Vitness'es:

justing said sheave laterally, and a strap or JOHN C. DEWEY,

cord passing over said sheave to connect the CLARENCE M. SOHOFIELD.

